Malicious PDF — malware analysis report

Static analysis result for SHA-256 179222f812f0448f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 13:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 39554a73186f1531fdb374d6a396dea6 SHA-1: abc3bd674cf635efbabfa9fda03369dfaa7bd1d3 SHA-256: 179222f812f0448f3f45b8f4617c14cce28281077f1604a949a6a2b3ae155594
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/games-for-robux-game-hack PDF link annotation
    • http://winnerwater.com.tw/image/data/files/free-robux-no-human-verification-android-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/broken-bones-iv-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/pubg-70-uc_GM1330123889.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-20219-robux-hack-versao-2390202159_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-best-hack-for-apocalypse-rising-spawn-numbers_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-one-piece-ocean-voyage-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-pet-simulator-free-vip-server_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-get-everything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/roblox-mad-city-script-hack_GM431946152.pdfIn PDF document text
    • http://winnerwater.com.tw/image/data/files/how-to-reach-hacks-in-sf-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 22048 bytes
SHA-256: 77fe7ef7a2ac9eac684449c271623a0d10b9dce95d794e6e374d1254851f0240
font_01_sfnt_off00006117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 18976 bytes
SHA-256: 090ea4c6042fee042727c6b8a892a5a58e907418997767bf433bab9fde8fbe7f

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